Stoker grate



Feb. 14, 1933. T J COURTNEY 1,897,112

STOKER GRATE Filed April 12, 1929 2 Sheets-Sheet l 1 L8 ,5 Thamzis LlCuurZn abtomgd T. J. COURTNEY STOKER GRATE Filed April 12, 1929 2 Sheets-Sheet 2 Feb. 14, 1933.

Patented Feb. 14, 1933 THOMAS J. COURTNEY, OF ORANGE, NEW JERSEY STOKER.

Application filed April 12,

This invention relates to improvements in stoker grates, particularly of a type disclosed in the applicants previous Patents Nos. 1,437,931 and 1,600,868.

A prime object of this invention is to provide a stoker grate section having improved means for detachably connecting with the grate bar, and at the same time allowing the maximum air circulation.

ther objects of this invention will appear from the following detailed description and as disclosed in the two sheets of drawings which are herewith made a part of this application.

In the drawings- Figure 1 illustrates a perspective View of the stoker grate according to this invention.

Figure .2 represents a bottom plan view of a stoker grate section.

Figure 3 illustrates avertical sectional view of a portion of a stoker grate disclosing a plurality of grate sections in assembled relationship to each other and the means for connecting them to the grate bar.

Figure 4 represents a sectional view of Figure 8 taken along line 44.

Figure 5 represents a vertical sectional view of a modification of this invention in the means for detachably holding the grate sections in connection with the grate bar.

Figure 6 is aperspective view showing the seal between the grate bars and grate sections.

As one embodiment or modification of this invention, it is preferred that numeral 1 designate a stoker grate section having a plurality of openings 2 for the passage of air upwardly, the openings 2 being flared, as clearly disclosed in the figures of drawings.

Numeral 3 designates the grate bar to which is properly secured the chain conveyor l which carries the grate sections from one end of the stoker to the other.

The grate bar 8 is provided with a shelf r portion 5 having an opening therein for the purpose of receiving a bolt member 6 which functions to hold securely attached to the shelf member a channel elements 7 having flaring sides adapted to inter-engage with T-head portions or feet 8 which may be integrally formed on the grate section 1 or other- GRATE 1929. Serial No. 354,615.

wise secured thereto, said feet being provided with inwardly extending portions 9 for the purpose of cooperating with the channel element 7, as shown in Figure 3.

The grate section 1 is not only provided with downwardly extending feet 8, but also with a transversa-lly, downwardly extending flange or seal 10 at the heel end of the grate section, each having suitably formed shoulder portions 12 defining recesses for holding the toe 11 of an adjacent grate section in assembled and operative position.

A plurality of grooves 13 are formed in the downwardly extending flange 10 for the purpose of allowing the air to circulate between two adjacent edges of the stoker grate sections.

As a modification of the stoker grate section, numeral 14 designates a foot extending from the stoker grate section 15, as clearly disclosed in Figure 5, the foot 14: being formed having one of its downwardly extending elements 16 hook shaped, while the opposite downwardly extending element 17 is formed without the hook, but provided with 7 an opening through which a set screw 18 is adapted to extend, and may be so adjusted that the stoker grate section is held-firmly in connection with the grate bar 19 and the holding member 20. In order to release the stoker grate section from the grate bar 19, it is merely necessary to retract the set screw 18, as clearly disclosed in Figure 5.

In order to provide efficient reinforcement for the stoker grate section 1, it is preferred 85 that downwardly extending ribs 21 and 22 be integrally formed on the stoker grate section 1, as clearly disclosed in Figure 2.

In operation this invention provides a stoker grate section having many advantages over existing devices. Figure 1 discloses a plurality of stoker grate sections in assembled and operative position, wherein the advantages of the air grooves 13 are clearly apparent, allowing as they do a free circulation of air between the abutting edges of the stoker grate sections as they travel with the chain members. At the same time, as clearly shown in Figure 3, when one of the stoker grate sections is just about to turn at the end 1 mum of its horizontal movement, the two adjacent cooperating stoker grate sections are separated-and spaced from each other asapproximately disclosed Figure 3 as at 23, the

shoulder 12 bridges the space that would a. otherwise open up,insucha manner that the 7 possibility of coal,@-ash or other material o p g down elow the Stoker gratesec;

' ons is practically eliminated. Th 180 considerable:importan i y g wopgmtipny I an automatie'stoker; f

7 thereby allowing the free'flow of airdirectbars, as clearly disclosed in- Figures 8 and 5 of the drawings, therebyeliminating many it l I v of the, complications found in the adjustment v v of the Stoker: grate sections now in ordinary The downwardly extending flange 10 also lends itself .to increased efiiciency, forthe I reason that the usual tailfiange is omitted,

- .ly adjacent to the flange -10.

It. willbe understood thatmany changes and modifications maybemade inthe form of I the embodiment of the invention withinthe scopeof, the following claim without departingfrom the spiritctherejof.

What I claim-is:

: .The herein described stoker grate; -comprising adjoining grate barshaVing'a-trans' erse member "at one end,? grate sections mounted on and spaced above said bars, each rgrate section being undercut atthe end adoining the othersection to form a beveled edge, the adjoining end ofthlesaidjothersection having a downwardly extendingflange, the-outer surface of which is first inclined downward and :outwardto fit theundercut;

end of the first named grate section, and then extended in a generally downward direction into sealing engagement withsaidtransv'erse member throughout its length; whereby-the spaces directly beneath the grate sections are sealed from the spacesbeneath adjoining sec tions, the gratesections being perforated to permit the passage ofair. i

In testimony whereof Iafl'ix mys ignature. 

